Scrubbing / forward / rewind: arrow right, arrow left keys Jump to start: Home or `s` , you can also click/tap the lesson part again (the numbers above player) Go to next part: PageUP or End. ( iOS: swipe right or left over video ) Volume: ArrowUp / ArrowDown keys Go to any part: Number keys (combinations also possible) Pause or play: `k` or space key Fullscreen: `f`, esc to close